Method of introducing compositions into electric conductors



'(NoMdel.)

D. BROOKS, Jr.

METHOD OP INTRODUCING GOMPOSITIONS INTO ELEGTRIC GONDUOTORS.

No. 427.039. Patented-May 6, 1890.

I INVENTOR:

U'Nrrn' *ratns PATENT Qr rina DAVID-BROOKS, JRL, OF PHILADELPHIA,PENNSYLVANIA.

METHOD OF lNTRODUClNG COMPOSITlONS lNTO ELECTRlC CONDUCTORS.

SPECIFICATION forming part of Letters Patent Ne. &27,039, dated May 6,1890.

Application filed March 1, 1889. Serial No. 301,(564. (No model.)

To (all whom it may con/067%.-

Be t known that I, DAVID BROOKS, Jr., a citizen ot the United States,residing in the city and county of Philadelphia, State of.

Pennsylvania, have invented a new and useful Improvement in IntroducingProtecting Materials or Compositions into Electric Conductors, whichimprovement is fully set forth in the following specification andaccompanying drawings.

My invention consists of a novel manner of introducing a linin g ofprotecting material or composition inlo a conduit for electricconduetors, as will be hereinatter set forth.

Figure 1 represents an apparatus employed in carrying my invention intoeffect. Fig. 2 represents a perspective View of a portion of the same. 4

Similar letters of reference indicate corresponding parts in the severalfigures.

In carrying out my invention I prepare a conduit or duet for electricconductors to receive proteeting materials and cables of electric wires,as 'follows: Dry swabs of cotton or cotton waste are run through theconduit, so as to dry the same or absorb the mosture that it maycontain. If desired, this may be accelerated by the use of a hot-airblast. I then introduce into the conduit a composition of non-fusiblepowder or oil or any semifluid material, such as powdered soapstone orsoapstone and rosin-oil, either of these being preferred, since eitheror both prevent water or moisture from passing through a good layer orcoating. It may be convenient to introduce the protecting material intoeach section of the conduit as it is laid, care being taken to leavesuffioient space for the cable to enter subsequently. The material mayalso be introduced into the spliceboxes, &0.

The material has for its object the filling of the space left betweenthe cable and sides of the conduit to prevent the circulation ot air andgases, and also prevent the introduction of water or moisture andforeign matter into the conduit, the material owing to its semifluid ormovable nature also allowing the cable to be drawn out and replaced asdesi red.

The cable may be of' dried fibrous, tissuecovered, rubber insulation, orother suitable kind.

I now employ a movable tank A, contain- -ing a reel B, on which is wounda Wire or other rope C, said tank being supplied with the protectingmaterial. Secured to the rope at intervals are buckets or carriers D, towhose peripheries are attachedlugs E, Whereby said buckets are preventedfrom droppiug into erevices or separated joints in the length of the.Conduit. reel in the tank through the discharge-pipe- F, which isincommunication with said tank and the Conduit, and likewise drawn into*and through the conduit, whereby the material is conveyedinto thelatter.

The rope should be pulled through the conduit for some time after thematerial appears at the end G of the conduit, as some of said materialwill return over the buckets, the latter being of such diameters thatwhen the cable is subsequently introduced into the The rope is drawnfrom the e eonduit sufcient space will be left for the 4 central openingor space through which the buckets were passed. v

I am aware that it is not new to employ as nsulating material soapstonewith either' paraffine or crude petroleum but as both these oils arelighter than water they would not serve the purpose intended by myinvention, whe'ein the mixture placed in the conduit in the mannerdescribed serves not as an insulator, but as a protector to preventmoisture or decay.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The heroin-described method of preparing a Conduit fol' eleet'c Wres,consistng, firsfi, I riers to fill said Conduit, and, lastly,withdra\xin thoroughly dryng the interier of said tube ing said rope andea''lers, substantal] y as by passing through the same dry Waste anddescribed.

hot air, then drawing into the Conduit and DAVID BROOKS, JR. 5 along theinterio' of the same a suffieient NVtesses: v

quantty of soapstone and rosn-o1 01' their JOHN A. IEDERSHEIM,

equvalents by means of a 'ope with cz'- A. P. JENNINGS.

